Thanks to Mr. Kariyasu here is the flag of the village of Hidaka.Tomislav Šipek, 12 December 2014

The village emblem was adopted on Feb 15th 1966
but there is no flag law.
The maroon flag has a white village emblem in the center.
The village emblem is a stylized hiragana ひ Hi of Hidaka in a circle.Nozomi Kariyasu, 12 December 2014